题目内容
(2011?鄞州区模拟)脱式计算.
33.02-(148.4-90.85)÷2.5.
33.02-(148.4-90.85)÷2.5.
分析:先算括号内的,再算括号外的除法,最后算括号外的减法.
解答:解:33.02-(148.4-90.85)÷2.5,
=33.02-57.55÷2.5,
=33.02-23.02,
=10.
=33.02-57.55÷2.5,
=33.02-23.02,
=10.
点评:解决此题的关键在于注意运算顺序.
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